Qiu Xinkai, Rousseva Sylvia, Ye Gang, Hummelen Jan C, Chiechi Ryan C
Stratingh Institute for Chemistry, University of Groningen, Nijenborgh 4, 9747 AG, Groningen, Netherlands.
Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG, Groningen, Netherlands.
Adv Mater. 2021 Jan;33(4):e2006109. doi: 10.1002/adma.202006109. Epub 2020 Dec 16.
The reconfiguration of molecular tunneling junctions during operation via the self-assembly of bilayers of glycol ethers is described. Well-established functional groups are used to modulate the magnitude and direction of rectification in assembled tunneling junctions by exposing them to solutions containing different glycol ethers. Variable-temperature measurements confirm that rectification occurs by the expected bias-dependent tunneling-hopping mechanism for these functional groups and that glycol ethers, besides being an unusually efficient tunneling medium, behave similarly to alkanes. Memory bits are fabricated from crossbar junctions prepared by injecting eutectic Ga-In (EGaIn) into microfluidic channels. The states of two 8-bit registers were set by trains of droplets such that they are able to perform logical AND operations on bit strings encoded into chemical packets that alter the composition of the crossbar junctions through self-assembly to effect memristor-like properties. This proof-of-concept work demonstrates the potential for fieldable devices based on molecular tunneling junctions comprising self-assembled monolayers and bilayers.
描述了通过二醇醚双层自组装在操作过程中分子隧道结的重新配置。通过将成熟的官能团暴露于含有不同二醇醚的溶液中，来调节组装隧道结中整流的大小和方向。变温测量证实，这些官能团通过预期的偏置依赖隧道跳跃机制发生整流，并且二醇醚除了是一种异常有效的隧道介质外，其行为与烷烃相似。存储位由通过将共晶镓铟（EGaIn）注入微流体通道制备的交叉点结制成。两个8位寄存器的状态由一系列液滴设置，使得它们能够对编码到化学包中的位串执行逻辑与操作，这些化学包通过自组装改变交叉点结的组成，以实现类似忆阻器的特性。这项概念验证工作展示了基于包含自组装单层和双层的分子隧道结的可部署设备的潜力。
